TITLE:
Mid-Term Review of ADEPT Metal-On-Metal Hip Prosthesis. Functional, Radiological and Metal Ion Analysis
AUTHORS:
James G. A. Plant, Gareth H. Prosser, Ben J. Burston, Stephen J. Edmondston, Piers J. Yates
KEYWORDS:
Metal-On-Metal; Arthroplasty; Modular; Resurfacing; ADEPT; Chromium Ions; Cobalt Ions; Functional Review
JOURNAL NAME:
Open Journal of Orthopedics,
Vol.4 No.2,
February
26,
2014
ABSTRACT: Background:
There is much interest regarding metal-on-metal implants in medical and general
media. Much of this has been regarding failure of specific implant systems and
metal ion toxicity. We present our early mid-term experience of
the ADEPT metal-on-metal system which has both modular and non-modular hip
options. Methods: Functional assessment, blood metal ion quantification, and
radiographic analysis were performed for the modular and non-modular ADEPT
variants. Fifty implants were implanted with a mean follow up time of 28
months. Unpaired t-tests were used to compare modular and resurfacing groups,
standardised hip scores were used to compare function to conventional total hip
arthroplasty. Results: Metal ion levels were significantly higher in modular
prostheses compared to resurfacing implants, but not at “harmful” levels (as
determined by a previous metal-on-metal implant recall). Functional outcomes
were excellent and revision rates were lower than expected. Conclusions: At our institution we have good
outcomes with the ADEPT hip prosthesis. Though patient selection and implant position are crucial, poor performance of metal-on-metal hip
replacements is implant specific.